Answer:
a) The force is zero, or the displacement is zero, or the angle is 180 degrees
b) The kinetic energy, speed, and velocity of the particle change.
c) W1 = - W2
Answer:
### ####C ##v ### ##U
Explanation:
### A time of high unemployment and falling prices.
The answer is transformed
because you changed the kind of energy
Using the concepto of Irradiance which is the radiant flux (power) received by a surface per unit area we have that,

Here,
P = Power
A = Area
The propagation of the irradiance is carried out in an area proportional to that of a sphere we will then have,

Irradiance at a distance of 1m from the source of light is



Irradiance at a distance of 2m from the source of light is



Explanation:
Image Shadow
2. We are able to see images when light refraction enters our eyes.
In the case of shadow no light enters our eyes.
3. Image contains colour, structure etc. of the object.
Shadow does not give any information about the object as it is colourless